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Oort cloud   Listen
Oort cloud

noun
1.
(astronomy) a hypothetical huge collection of comets orbiting the sun far beyond the orbit of Pluto; perturbations (as by other stars) can upset a comet's orbit and may send it tumbling toward the sun.






WordNet 3.0 © 2010 Princeton University








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Words linked to "Oort cloud" :   accumulation, uranology, aggregation, astronomy, assemblage, collection



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